The story
From freedom ride + -er.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: In the United States during 1961, a civil rights activist who participated in one or more trips by bus or other forms of transport, known as freedom rides, through parts of the southern U.S. to demonstrate opposition to racial prejudice and segregation. Full definition →
From freedom ride + -er.
Etymology from Wiktionary, CC BY-SA 4.0.